We show in fig:STU the EW precision observables in the \(S\) -\(U\) , \(S\) -\(T\)  and \(U\) -\(T\)  projections. Current precision measurements [1]} provide the allowed regions,
\(S = -0.01 \pm 0.10\,, \qquad T = 0.03 \pm 0.12\,, \qquad U = 0.02 \pm 0.11 \ ,\) 
